I want to delete all index.php file only if the code inside contain specific expres

I want to delete all index.php files, in all directories and sub-directories file that had this specific expression on it’s code

if ( !class_exists( 'WPPluginsOptions' ) )

can we do this in ssh using Linux command or whatever

Answer

1. Find all files named index.php using the linux find command.
2. Search in the files for the string if ( !class_exists( 'WPPluginsOptions' ) ) using the linux grep command with the -l flag. (Only output files that match what you are looking for )
3. Use the linux xargs command to send the list of files from the grep command to the linux rm command.

All together.

find -L /var/www -iname "index.php" -exec egrep -l 'if ( !class_exists( '"'"'WPPluginsOptions'"'"' ) )' {} + | xargs rm -f

Be careful with this command because it doesn’t ask you before deleting files. You should test it in a safe place before running it in production.